"All right," she blurted out rebelliously, "I went to bed with him once. So what? I ran into him at the Palm Garden as a matter of fact. I nearly told you the other day. He was the one who told me Nikki was out of town. I was shocked that he'd even speak to me." She switched to the Scotch, taking a big drink.

She was fabricating as fast as she could and it sounded nice but it was like listening to a record album. I decided to skip the cuts I didn't want to hear. I bumped her again.

"It was more than once, Gwen," I said. "You had a fullblown affair with him. Charlotte Mercer was screwing his headoff back then but he broke it off with her. She says he was into something very hush-hush. 'Very hot,' to quote her. I think it was you."

"What difference does it make if we had an affair. He'd been doing that for years."

I let a little time elapse and when I spoke I kept my voice low, leaning forward slightly just to give her the full effect.

"I think you killed him."

The animation drained out of her face as though a plug had been pulled. She started to say something but she couldn't get it out. I could see her mind working, but she couldn't put anything together quickly enough. She was struggling and I pressed.

"You want to tell me about it?" I said. My own heart was pounding and I could feel damp rings of sweat forming under my arms.

She shook her head but that was all she could manage. She seemed transfixed. Her face had changed, taking on that look people get in their sleep when all the guards are down. Her eyes were luminous and dark and two bright patches of pink appeared now in the pale of her cheeks, a clownish effect, as though she'd applied too much blusher in an artificial light. She blinked back tears then, propping her chin on her fist, looking off beyond me, fighting for self-control, but the last defense was breached and the guilt was pushing against that gorgeous facade. I'd seen it happen before. People can hold out just so long and then they fold. She was really an amateur at heart.

"You got pushed too hard and you broke," I said, hoping I wasn't overplaying my hand. "You waited until he and Nikki left town and then you used Diane's keys to get into the house. You put the oleander capsules in his little plastic vial, being careful to leave no prints, and then you left."